http://testyourvocab.com/?r=777903 Your total vocabulary size is estimated to be: 16,100 words.
Based on over 200,000 participations so far, we've got some initial statistics already. Most Native English adult speakers who have taken the test fall in the range 20,000-35,000 words. Click here for a full breakdown by age (opens in new tab/window).
And for foreign learners of English, we've found that the most common vocabulary size is from 2,500-9,000 words. Click here for the full distribution (opens in new tab/window).
However, we still need more data for complete analysis by age or education level, especially for participants under 15.